<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
   
    <a href="http://baidu.com" onclick="return confirm('确定删除吗')">百度</a>
    <a href="javaScript:;">baidu </a>
    <form action="http://baidu.com" onsubmit="return foo()">
      <input type="text" name="money" />
      <input type="submit" /> 提交
    </form>
    <script>
         //阻止跳转事件
      var A = document.getElementsByTagName('a')[0];
      A.addEventListener('click', function (event) {
        event.preventDefault();
      });

      function foo() {
        return false;
      }
    </script>
  </body>
</html>
